function Rabbit(name) {
	this.name = name
}
Rabbit.prototype.sayHi = function () {
	alert(this.name)
}

let rabbit = new Rabbit('Rabbit')

rabbit.sayHi() // Rabbit
Rabbit.prototype.sayHi() // undefined
Object.getPrototypeOf(rabbit).sayHi() // undefined
rabbit.__proto__.sayHi() // undefined
